1 files changed, 3 insertions, 2 deletions

diff --git a/mm/mmap.c b/mm/mmap.c
index 74f4d158022e..d4855a682ab6 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -175,7 +175,8 @@ int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin)
 
         /* Don't let a single process grow too big:
            leave 3% of the size of this process for other processes */
-        allowed -= mm->total_vm / 32;
+        if (mm)
+                allowed -= mm->total_vm / 32;
 
         /*
          * cast `allowed' as a signed long because vm_committed_space
@@ -1703,7 +1704,7 @@ find_extend_vma(struct mm_struct *mm, unsigned long addr)
         vma = find_vma_prev(mm, addr, &prev);
         if (vma && (vma->vm_start <= addr))
                 return vma;
-        if (expand_stack(prev, addr))
+        if (!prev || expand_stack(prev, addr))
                 return NULL;
         if (prev->vm_flags & VM_LOCKED) {
                 if (mlock_vma_pages_range(prev, addr, prev->vm_end) < 0)